The RS/6000 has got 2 internal SCSIW disks, one is 1.08GB, the other 4.3GB.
There's also an external SCSI tower with 2 SCSIW disks.
I don't know what's on which disks. I just know that AIX 4.1 must be on the crashed 1.08GB disk, because the box isn't booting up, with or without it being...